Rit DyeMore Synthetic Dye will dye polyester cotton blends, nylon, acrylic, and acetate fabrics. Stove top method is required for dying synthetic materials. Heat dye product to between 180°-212°, and maintain that temp for the dying time. 7 fluid oz bottle will dye up to 2 pounds of dry fabric, however polyester requires 2 bottles. Please read all instructions printed on the bottle.